63403331 has 2 divisors, whose sum is σ = 63403332. Its totient is φ = 63403330.

The previous prime is 63403297. The next prime is 63403337. The reversal of 63403331 is 13330436.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63403331 is a prime.

It is a super-2 number, since 2×63403331² = 8039964763791122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 63403297 and 63403306.

It is not a weakly prime, because it can be changed into another prime (63403337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31701665 + 31701666.

It is an arithmetic number, because the mean of its divisors is an integer number (31701666).

Almost surely, 2^63403331 is an apocalyptic number.

63403331 is a deficient number, since it is larger than the sum of its proper divisors (1).

63403331 is an equidigital number, since it uses as much as digits as its factorization.

63403331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1944, while the sum is 23.

The square root of 63403331 is about 7962.6208625050. The cubic root of 63403331 is about 398.7530564520.

Adding to 63403331 its reverse (13330436), we get a palindrome (76733767).

The spelling of 63403331 in words is "sixty-three million, four hundred three thousand, three hundred thirty-one".